C++ testbed

cpp_testbed.cpp

#include <iostream>

/* implementing virtual functions */
class B
{
public:
	B() { f1(); }
	/* compilers typically number the virtual functions in the order
	in which they're declared */
	virtual ~B() {}
	virtual void f1() { f3(10); };
	virtual int f2(char c) const {}
	virtual void f3(int x) = 0;
	void f4() const {}
};

class C : public B
{
public:
	C() {}
	~C(){}
	virtual void f1() { std::cout << "f1" << std::endl; };
	virtual int f2(char c) const {std::cout << "f2" << std::endl;};
	virtual void f3(int x) { std::cout << "f3" << std::endl; };
	void f4() const {std::cout << "f4" << std::endl;}
};


int main(int argc, char const *argv[])
{
	C c;

	auto hello = []() { std::cout << "Hell, world!" << std::endl; };
	hello();

	return 0;
}